:root{--bg:#f5f7fb;--card:#fff;--text:#13213a;--muted:#65748b;--line:#e5eaf1;--primary:#2563eb;--primary2:#1d4ed8;--good:#15803d;--bad:#b91c1c;--soft:#eef4ff;--shadow:0 10px 30px rgba(15,23,42,.07)}
:root.dark{--bg:#0b1220;--card:#111b2e;--text:#eaf0fb;--muted:#9dacbf;--line:#22314b;--primary:#60a5fa;--primary2:#3b82f6;--good:#4ade80;--bad:#f87171;--soft:#17233a;--shadow:none}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Tahoma,Arial,sans-serif;line-height:1.6}.topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:22px clamp(18px,4vw,48px);background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.topbar h1{margin:0;font-size:clamp(22px,3vw,34px)}.topbar p{margin:2px 0 0;color:var(--muted)}.top-actions{display:flex;gap:8px;flex-wrap:wrap}.container{max-width:1120px;margin:0 auto;padding:28px 18px 60px}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow);margin-bottom:18px}.hero{display:grid;grid-template-columns:1fr 1.3fr;gap:24px;align-items:center}.eyebrow{color:var(--primary);font-weight:800;font-size:13px}.profiles{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.profile{border:1px solid var(--line);background:var(--bg);border-radius:16px;padding:16px;text-align:right;cursor:pointer;transition:.2s}.profile:hover{transform:translateY(-2px);border-color:var(--primary)}.profile strong{display:block;font-size:18px}.profile span{color:var(--muted);font-size:13px}.grid{display:grid;gap:14px}.two{grid-template-columns:1fr 1fr}.stats{grid-template-columns:repeat(4,1fr)}.stat{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px}.stat b{font-size:24px;display:block}.stat span{color:var(--muted);font-size:13px}.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.badge{display:inline-block;padding:5px 10px;border-radius:999px;background:var(--soft);font-size:13px}.soft{color:var(--primary)}button,.file-label,select{font:inherit}button,.file-label{border:0;border-radius:12px;padding:10px 14px;cursor:pointer}.primary{background:var(--primary);color:white;font-weight:800}.primary:hover{background:var(--primary2)}.secondary{background:var(--soft);color:var(--primary);font-weight:800;border:1px solid color-mix(in srgb,var(--primary) 20%, transparent)}.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}.wide{width:100%;margin-top:10px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.form-grid label{display:grid;gap:6px;color:var(--muted)}select{background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:10px}.note{color:var(--muted)}.progress-wrap{height:10px;background:var(--bg);border-radius:999px;overflow:hidden}.progress{height:100%;width:0;background:var(--primary);transition:.2s}.question-head{display:flex;justify-content:space-between;margin:14px 0}.question{font-size:clamp(21px,3vw,30px);margin:20px 0}.choices{display:grid;gap:12px}.choice{width:100%;text-align:right;background:var(--bg);border:1px solid var(--line);color:var(--text);padding:15px;border-radius:14px}.choice:hover{border-color:var(--primary)}.choice.selected{outline:2px solid var(--primary)}.choice.correct{border-color:var(--good);background:color-mix(in srgb,var(--good) 10%,var(--card))}.choice.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 10%,var(--card))}.exam-actions{display:flex;justify-content:space-between;margin-top:22px}.feedback{margin-top:16px;padding:14px;border-radius:12px;background:var(--soft)}.hidden{display:none!important}.result-card{text-align:center}.mistake{padding:14px 0;border-bottom:1px solid var(--line)}.mistake:last-child{border-bottom:0}.mistake .answer-bad{color:var(--bad)}.mistake .answer-good{color:var(--good)}.history-row{display:grid;grid-template-columns:1.2fr .8fr .8fr .8fr;gap:10px;padding:12px 0;border-bottom:1px solid var(--line)}.weak-list{display:flex;flex-wrap:wrap;gap:8px}.chip{padding:8px 10px;background:var(--bg);border:1px solid var(--line);border-radius:999px}.empty{color:var(--muted);padding:16px 0}@media(max-width:760px){.topbar{position:static;align-items:flex-start;flex-direction:column}.hero,.two{grid-template-columns:1fr}.stats{grid-template-columns:repeat(2,1fr)}.profiles{grid-template-columns:1fr}.history-row{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}}
.name-input{background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:10px;padding:11px;font:inherit;width:100%}
.auth-card{max-width:720px;margin:30px auto}.field{display:grid;gap:7px;margin:12px 0;color:var(--muted)}.setup-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.sync-ok{color:var(--good)}.sync-bad{color:var(--bad)}@media(max-width:760px){.setup-grid{grid-template-columns:1fr}}